"太古代" meaning in Japanese

{
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    {
      "args": {
        "1": "太古",
        "2": "たいこ",
        "3": "代",
        "4": "-だい",
        "t1": "ancient times",
        "t2": "era"
      },
      "expansion": "太古(たいこ) (taiko, “ancient times”) + 代(だい) (-dai, “era”)",
      "name": "ja-com"
    }
  ],
  "etymology_text": "太古(たいこ) (taiko, “ancient times”) + 代(だい) (-dai, “era”)",
  "forms": [
    {
      "form": "太古代",
      "ruby": [
        [
          "太",
          "たい"
        ],
        [
          "古",
          "こ"
        ],
        [
          "代",
          "だい"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "Taikodai",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "proper",
        "2": "たいこだい"
      },
      "expansion": "太(たい)古(こ)代(だい) • (Taikodai)",
      "name": "ja-pos"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "name",
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          "kind": "other",
          "name": "Japanese entries with incorrect language header",
          "parents": [],
          "source": "w"
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          "parents": [],
          "source": "w"
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          "kind": "other",
          "name": "Japanese links with redundant wikilinks",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms read with on'yomi",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms suffixed with 代 read as だい",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with 3 kanji",
          "parents": [],
          "source": "w"
        },
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          "parents": [],
          "source": "w"
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        },
        {
          "kind": "other",
          "langcode": "ja",
          "name": "Geology",
          "orig": "ja:Geology",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "ja",
          "name": "Time",
          "orig": "ja:Time",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "synonym of 始生代"
      ],
      "id": "en-太古代-ja-name-wbBXfXVW",
      "links": [
        [
          "始生代",
          "始生代#Japanese"
        ]
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          "word": "始生代"
        }
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    }
  ],
  "sounds": [
    {
      "other": "たいこだい"
    },
    {
      "ipa": "[ta̠iko̞da̠i]"
    }
  ],
  "word": "太古代"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "太古",
        "2": "たいこ",
        "3": "代",
        "4": "-だい",
        "t1": "ancient times",
        "t2": "era"
      },
      "expansion": "太古(たいこ) (taiko, “ancient times”) + 代(だい) (-dai, “era”)",
      "name": "ja-com"
    }
  ],
  "etymology_text": "太古(たいこ) (taiko, “ancient times”) + 代(だい) (-dai, “era”)",
  "forms": [
    {
      "form": "太古代",
      "ruby": [
        [
          "太",
          "たい"
        ],
        [
          "古",
          "こ"
        ],
        [
          "代",
          "だい"
        ]
      ],
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        "canonical"
      ]
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    {
      "form": "Taikodai",
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        "romanization"
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    {
      "args": {
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    }
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  "pos": "name",
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        "Japanese terms spelled with second grade kanji",
        "Japanese terms spelled with third grade kanji",
        "Japanese terms spelled with 代 read as だい",
        "Japanese terms spelled with 古 read as こ",
        "Japanese terms spelled with 太 read as たい",
        "Japanese terms suffixed with 代 read as だい",
        "Japanese terms with 3 kanji",
        "Japanese terms with IPA pronunciation",
        "Japanese terms with IPA pronunciation with pitch accent",
        "Japanese terms with Nakadaka pitch accent (Tōkyō)",
        "Japanese terms with non-redundant non-automated sortkeys",
        "Japanese terms with redundant sortkeys",
        "Pages with 2 entries",
        "Pages with entries",
        "ja:Geology",
        "ja:Time"
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      "glosses": [
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      ],
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          "始生代#Japanese"
        ]
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        }
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  ],
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    {
      "other": "たいこだい"
    },
    {
      "ipa": "[ta̠iko̞da̠i]"
    }
  ],
  "word": "太古代"
}